iLife 05 is preinstalled on PowerBook G4 (12-inch 1.5GHz), PowerBook G4 (15-inch 1.67/1.5GHz), and PowerBook G4 (17-inch 1.67GHz) computers. However, if you ever need to reinstall certain applications from iLife 05, you can do so.
When you go through the installer, you may not be able to select an individual application. (When you try to select just one application, all the applications are checked.) Simply uncheck the applications that you do not want to install.